Burner



July 21, 1925.

H. F. G RU EN EWALD BURNER Filed May 7, 1923 attormzq UNITED STATES PATENT OFFHQE.

HERMAN F. GRUENEWALD, OF ST. LOUIS, MISSOURI, ASSIG'NOB OF ONE-HALF TO AL- PHONSE 3'. HOEGEN AND ONE-HALF T0 JOHN PETERS, BOTI-I- OF ST. LOUIS, MIS- SOUR/I.

BURNER.

Application filed May 7,

T 0 all whom it may concern:

e it known that I, HERMAN F. Gnnnnnwane, a citizen of the United States, residing atthe city of Ft. Louis, in the State of Missouri, have invented certain new and useful Improvements in Burners, of which the following is a specification.

This invention pertains to oil burners and has for its object to provide means for obtaining for a minimum volume of oil a maximum surface for evaporation and for presentation to the air for combustion. This is accomplished by spreading the oil into a thin layer, and afurther object is to provide means for spreading the layer of oil evenly and uniformly. A still further object is to preheat the oil to facilitate its vaporization and to make for efficient combustion. Another object is to provide a burner which shall be simple in construction and easily adapted to any etiisting type of furnace or boiler. Other objects and advantages Will appear as the description proceeds.

In the accompanying drawings forming partof this specification, in which like numbers of reference denote like parts wherever they occur,

Figure 1 is a horizontal sectional view, hen on the line 11 of Figure 2, of a boiler to which the preferred form of this invention has been applied;

Figure 2 is a vertical central sectional view of the same.

Referring to the drawings, a boiler or furnace 1 has a horizontal grate 2 on which rests the plate 3. A tank 4 containing fuel oil is arranged at an elevated point outside the boiler 1 and supplies oil by gravity through T fitting 5 and valve (3 to a pipe 7 having a horizontal portion 8 passing through an opening 9 in the side of the boiler 1, and a vertical portion 10 descending to a point above the center of the plate 3. The plate 3 has a central horizontal surface 11 surrounded by a groove 12, which is in turn surrounded by a second horizontal surface 13 lower than the first surface 11, but higher than the bottom of the groove 1 Surface 13 is bounded by a groove 14,

1923. Serial No. 637,237.

which in turn is surrounded by a surface 15 lower than the surface 13, but higher than the bottom of the groove 14. The surface 15 is terminated outwardly by the vertical side 16. I

The oil descendingfrom pipe 7 is deposited centrally on the surface 11 and spreads to the groove 12. Any unevenness of flow which might have occurred on the surface 11 is checked on reaching the groove 12, which again distributes the oil uniformly to all parts of the surface 13. From surface 13 the oil spreads to groove 14, which redistributes it to surface 15. Air enters through openings 17 in the grate 2 and supplies oxygen for the combustion of the layer of oil on the top surfaces and grooves of the plate 3. This combustion in turn heats the plate 3 and the pipe 7 and thereby assists in the vaporization of the oil and tends to its more perfect combustion. An overflow recess 18 in surface 15 limits any overflow of oil to a single point.

Having thus described this invention, I hereby reserve the benefit of all changes in form, arrangement, order, or use of parts, as it is evident that many minor changes may be made therein without departing from the spirit of this invention or the scope of the following claims.

I claim: 7

1. A device of the kind described including a burner having a broad flat top, a base of greater diameter than the top and sides consisting of a plurality of steps grooved on their upper surfaces; in combination with means to deliver fuel oil gently and without splash on the center of the top.

2. A device of the kind described including a burner having a broad flat top, a base of greater diameter than the top and sides consisting of a plurality of steps grooved on their upper surfaces; in combination with a fuel oil delivery pipe having its outlet positioned closely above the center of the to fn testimony whereof I hereunto affix my signature.

HERMAN F. GRUENEWALD. 

